48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from typing import Any, Dict
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import pandas as pd
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class PandasSelectColumns:
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"""
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PandasSelectColumns:
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A class for selecting specific columns from a pandas DataFrame.
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"""
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@classmethod
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def INPUT_TYPES(cls) -> Dict[str, Any]:
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"""
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Defines the input types for the `select_columns` function.
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Returns:
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Dict[str, Any]: A dictionary specifying required input types.
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"""
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return {
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"required": {
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"dataframe_json": ("STRING", {"multiline": True}),
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"column_names": ("STRING", {"default": ""})
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}
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}
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RETURN_TYPES: tuple = ("STRING",)
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FUNCTION: str = "select_columns"
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CATEGORY: str = "Data Analysis"
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def select_columns(self, dataframe_json: str, column_names: str) -> tuple:
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"""
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Selects specific columns from a pandas DataFrame.
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Args:
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dataframe_json (str): A JSON string representation of the DataFrame.
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column_names (str): A comma-separated string of column names to select.
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Returns:
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tuple: A tuple containing a JSON string of the DataFrame with selected columns.
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"""
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# Deserialize JSON string to DataFrame
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df = pd.read_json(dataframe_json)
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# Process column names
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selected_columns = [col.strip() for col in column_names.split(",")]
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df2 = df[selected_columns]
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return (df2.to_json(),)
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